METHOD AND DEVICE FOR THE DISTILLATIVE PROCESSING OF 1,5,9-CYCLODODECATRIENE AND EXTRACTION OF CDT AT HIGH PURITY

摘要

The invention relates to a method for the distillative processing of a raw product containing cyclododecatriene obtained through the method of trimerization of butadiene, said method used for the extraction of the corresponding cyclododecatriene pure product. The distillative processing is carried out in either a dividing wall column in which a dividing wall is provided in the longitudinal direction of the column, forming an upper common column area, a lower common column area, a feed section with a reinforcing part and a down-thrust part and a withdrawal section with a down-thrust part and a reinforcing part, the raw product containing the cyclododecatriene being fed in the middle area of the feed section, a high-boiling fraction being drawn off from the column sump, a low-boiling fraction being drawn off of the column top and a mid-boiling fraction being drawn off of the middle area of the withdrawal section, or is carried out in thermally coupled columns.